Good morning.
With Aptana 2, a very useful function was the automatic hightlighting of the selected word : when double-clicking on a variable name, function name, ... (on a word), Aptana 2 automatically highlight this word in the document.
Why it was really useful : in the description of a function, when clicking on a variable declaration, if the variable is used, I can immediately see where.
With Aptana 3, I've lost this function. No doubt that I can configure the editor but I can't find where.